/**
 * Licensed to the Apache Software Foundation (ASF) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the License. You may obtain a
 * copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software distributed under the License
 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
 * or implied. See the License for the specific language governing permissions and limitations under
 * the License.
 */

package edu.uci.ics.crawler4j.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

import org.apache.log4j.Logger;

/**
 * @author Yasser Ganjisaffar <lastname at gmail dot com>
 */
public class IO
{
    private static final Logger logger = Logger.getLogger(IO.class.getName());

    public static boolean deleteFolder(File folder)
    {
        return deleteFolderContents(folder) && folder.delete();
    }

    public static boolean deleteFolderContents(File folder)
    {
        logger.debug("Deleting content of: " + folder.getAbsolutePath());
        File[] files = folder.listFiles();
        for (File file : files) {
            if (file.isFile()) {
                if (!file.delete()) {
                    return false;
                }
            } else {
                if (!deleteFolder(file)) {
                    return false;
                }
            }
        }
        return true;
    }

    public static void writeBytesToFile(byte[] bytes, String destination)
    {
        logger.debug("Writing to " + destination);
        FileChannel fc = null;
        try {
            fc = new FileOutputStream(destination).getChannel();
            fc.write(ByteBuffer.wrap(bytes));
            fc.close();
        } catch (Exception e) {
            logger.error("Error when writing to " + destination, e);
        }

        finally {
            if (fc != null) {
                try {
                    fc.close();
                } catch (IOException e) {
                    logger.error("Error when trying to close after writing to " + destination, e);
                }
            }
        }
    }
}
